diff options
Diffstat (limited to 'drivers/char/i8k.c')
| -rw-r--r-- | drivers/char/i8k.c | 909 |
1 files changed, 327 insertions, 582 deletions
diff --git a/drivers/char/i8k.c b/drivers/char/i8k.c index a81197640283..6c4b3f986d0c 100644 --- a/drivers/char/i8k.c +++ b/drivers/char/i8k.c @@ -20,13 +20,14 @@ #include <linux/types.h> #include <linux/init.h> #include <linux/proc_fs.h> -#include <linux/apm_bios.h> +#include <linux/seq_file.h> +#include <linux/dmi.h> #include <asm/uaccess.h> #include <asm/io.h> #include <linux/i8k.h> -#define I8K_VERSION "1.13 14/05/2002" +#define I8K_VERSION "1.14 21/02/2005" #define I8K_SMM_FN_STATUS 0x0025 #define I8K_SMM_POWER_STATUS 0x0069 @@ -34,7 +35,8 @@ #define I8K_SMM_GET_FAN 0x00a3 #define I8K_SMM_GET_SPEED 0x02a3 #define I8K_SMM_GET_TEMP 0x10a3 -#define I8K_SMM_GET_DELL_SIG 0xffa3 +#define I8K_SMM_GET_DELL_SIG1 0xfea3 +#define I8K_SMM_GET_DELL_SIG2 0xffa3 #define I8K_SMM_BIOS_VERSION 0x00a6 #define I8K_FAN_MULT 30 @@ -52,18 +54,7 @@ #define I8K_TEMPERATURE_BUG 1 -#define DELL_SIGNATURE "Dell Computer" - -static char *supported_models[] = { - "Inspiron", - "Latitude", - NULL -}; - -static char system_vendor[48] = "?"; -static char product_name [48] = "?"; -static char bios_version [4] = "?"; -static char serial_number[16] = "?"; +static char bios_version[4]; MODULE_AUTHOR("Massimo Dal Zotto (dz@debian.org)"); MODULE_DESCRIPTION("Driver for accessing SMM BIOS on Dell laptops"); @@ -73,6 +64,10 @@ static int force; module_param(force, bool, 0); MODULE_PARM_DESC(force, "Force loading without checking for supported models"); +static int ignore_dmi; +module_param(ignore_dmi, bool, 0); +MODULE_PARM_DESC(ignore_dmi, "Continue probing hardware even if DMI data does not match"); + static int restricted; module_param(restricted, bool, 0); MODULE_PARM_DESC(restricted, "Allow fan control if SYS_ADMIN capability set"); @@ -81,69 +76,69 @@ static int power_status; module_param(power_status, bool, 0600); MODULE_PARM_DESC(power_status, "Report power status in /proc/i8k"); -static ssize_t i8k_read(struct file *, char __user *, size_t, loff_t *); +static int i8k_open_fs(struct inode *inode, struct file *file); static int i8k_ioctl(struct inode *, struct file *, unsigned int, unsigned long); static struct file_operations i8k_fops = { - .read = i8k_read, - .ioctl = i8k_ioctl, + .open = i8k_open_fs, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, + .ioctl = i8k_ioctl, +}; + +struct smm_regs { + unsigned int eax; + unsigned int ebx __attribute__ ((packed)); + unsigned int ecx __attribute__ ((packed)); + unsigned int edx __attribute__ ((packed)); + unsigned int esi __attribute__ ((packed)); + unsigned int edi __attribute__ ((packed)); }; -typedef struct { - unsigned int eax; - unsigned int ebx __attribute__ ((packed)); - unsigned int ecx __attribute__ ((packed)); - unsigned int edx __attribute__ ((packed)); - unsigned int esi __attribute__ ((packed)); - unsigned int edi __attribute__ ((packed)); -} SMMRegisters; - -typedef struct { - u8 type; - u8 length; - u16 handle; -} DMIHeader; +static inline char *i8k_get_dmi_data(int field) +{ + return dmi_get_system_info(field) ? : "N/A"; +} /* * Call the System Management Mode BIOS. Code provided by Jonathan Buzzard. */ -static int i8k_smm(SMMRegisters *regs) +static int i8k_smm(struct smm_regs *regs) { - int rc; - int eax = regs->eax; - - asm("pushl %%eax\n\t" \ - "movl 0(%%eax),%%edx\n\t" \ - "push %%edx\n\t" \ - "movl 4(%%eax),%%ebx\n\t" \ - "movl 8(%%eax),%%ecx\n\t" \ - "movl 12(%%eax),%%edx\n\t" \ - "movl 16(%%eax),%%esi\n\t" \ - "movl 20(%%eax),%%edi\n\t" \ - "popl %%eax\n\t" \ - "out %%al,$0xb2\n\t" \ - "out %%al,$0x84\n\t" \ - "xchgl %%eax,(%%esp)\n\t" - "movl %%ebx,4(%%eax)\n\t" \ - "movl %%ecx,8(%%eax)\n\t" \ - "movl %%edx,12(%%eax)\n\t" \ - "movl %%esi,16(%%eax)\n\t" \ - "movl %%edi,20(%%eax)\n\t" \ - "popl %%edx\n\t" \ - "movl %%edx,0(%%eax)\n\t" \ - "lahf\n\t" \ - "shrl $8,%%eax\n\t" \ - "andl $1,%%eax\n" \ - : "=a" (rc) - : "a" (regs) - : "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory"); - - if ((rc != 0) || ((regs->eax & 0xffff) == 0xffff) || (regs->eax == eax)) { - return -EINVAL; - } - - return 0; + int rc; + int eax = regs->eax; + + asm("pushl %%eax\n\t" + "movl 0(%%eax),%%edx\n\t" + "push %%edx\n\t" + "movl 4(%%eax),%%ebx\n\t" + "movl 8(%%eax),%%ecx\n\t" + "movl 12(%%eax),%%edx\n\t" + "movl 16(%%eax),%%esi\n\t" + "movl 20(%%eax),%%edi\n\t" + "popl %%eax\n\t" + "out %%al,$0xb2\n\t" + "out %%al,$0x84\n\t" + "xchgl %%eax,(%%esp)\n\t" + "movl %%ebx,4(%%eax)\n\t" + "movl %%ecx,8(%%eax)\n\t" + "movl %%edx,12(%%eax)\n\t" + "movl %%esi,16(%%eax)\n\t" + "movl %%edi,20(%%eax)\n\t" + "popl %%edx\n\t" + "movl %%edx,0(%%eax)\n\t" + "lahf\n\t" + "shrl $8,%%eax\n\t" + "andl $1,%%eax\n":"=a"(rc) + : "a"(regs) + : "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory"); + + if (rc != 0 || (regs->eax & 0xffff) == 0xffff || regs->eax == eax) + return -EINVAL; + + return 0; } /* @@ -152,24 +147,9 @@ static int i8k_smm(SMMRegisters *regs) */ static int i8k_get_bios_version(void) { - SMMRegisters regs = { 0, 0, 0, 0, 0, 0 }; - int rc; - - regs.eax = I8K_SMM_BIOS_VERSION; - if ((rc=i8k_smm(®s)) < 0) { - return rc; - } - - return regs.eax; -} + struct smm_regs regs = { .eax = I8K_SMM_BIOS_VERSION, }; -/* - * Read the machine id. - */ -static int i8k_get_serial_number(unsigned char *buff) -{ - strlcpy(buff, serial_number, sizeof(serial_number)); - return 0; + return i8k_smm(®s) ? : regs.eax; } /* @@ -177,24 +157,22 @@ static int i8k_get_serial_number(unsigned char *buff) */ static int i8k_get_fn_status(void) { - SMMRegisters regs = { 0, 0, 0, 0, 0, 0 }; - int rc; - - regs.eax = I8K_SMM_FN_STATUS; - if ((rc=i8k_smm(®s)) < 0) { - return rc; - } - - switch ((regs.eax >> I8K_FN_SHIFT) & I8K_FN_MASK) { - case I8K_FN_UP: - return I8K_VOL_UP; - case I8K_FN_DOWN: - return I8K_VOL_DOWN; - case I8K_FN_MUTE: - return I8K_VOL_MUTE; - default: - return 0; - } + struct smm_regs regs = { .eax = I8K_SMM_FN_STATUS, }; + int rc; + + if ((rc = i8k_smm(®s)) < 0) + return rc; + + switch ((regs.eax >> I8K_FN_SHIFT) & I8K_FN_MASK) { + case I8K_FN_UP: + return I8K_VOL_UP; + case I8K_FN_DOWN: + return I8K_VOL_DOWN; + case I8K_FN_MUTE: + return I8K_VOL_MUTE; + default: + return 0; + } } /* @@ -202,20 +180,13 @@ static int i8k_get_fn_status(void) */ static int i8k_get_power_status(void) { - SMMRegisters regs = { 0, 0, 0, 0, 0, 0 }; - int rc; - - regs.eax = I8K_SMM_POWER_STATUS; - if ((rc=i8k_smm(®s)) < 0) { - return rc; - } - - switch (regs.eax & 0xff) { - case I8K_POWER_AC: - return I8K_AC; - default: - return I8K_BATTERY; - } + struct smm_regs regs = { .eax = I8K_SMM_POWER_STATUS, }; + int rc; + + if ((rc = i8k_smm(®s)) < 0) + return rc; + + return (regs.eax & 0xff) == I8K_POWER_AC ? I8K_AC : I8K_BATTERY; } /* @@ -223,16 +194,10 @@ static int i8k_get_power_status(void) */ static int i8k_get_fan_status(int fan) { - SMMRegisters regs = { 0, 0, 0, 0, 0, 0 }; - int rc; - - regs.eax = I8K_SMM_GET_FAN; - regs.ebx = fan & 0xff; - if ((rc=i8k_smm(®s)) < 0) { - return rc; - } + struct smm_regs regs = { .eax = I8K_SMM_GET_FAN, }; - return (regs.eax & 0xff); + regs.ebx = fan & 0xff; + return i8k_smm(®s) ? : regs.eax & 0xff; } /* @@ -240,16 +205,10 @@ static int i8k_get_fan_status(int fan) */ static int i8k_get_fan_speed(int fan) { - SMMRegisters regs = { 0, 0, 0, 0, 0, 0 }; - int rc; + struct smm_regs regs = { .eax = I8K_SMM_GET_SPEED, }; - regs.eax = I8K_SMM_GET_SPEED; - regs.ebx = fan & 0xff; - if ((rc=i8k_smm(®s)) < 0) { - return rc; - } - - return (regs.eax & 0xffff) * I8K_FAN_MULT; + regs.ebx = fan & 0xff; + return i8k_smm(®s) ? : (regs.eax & 0xffff) * I8K_FAN_MULT; } /* @@ -257,532 +216,318 @@ static int i8k_get_fan_speed(int fan) */ static int i8k_set_fan(int fan, int speed) { - SMMRegisters regs = { 0, 0, 0, 0, 0, 0 }; - int rc; - - speed = (speed < 0) ? 0 : ((speed > I8K_FAN_MAX) ? I8K_FAN_MAX : speed); + struct smm_regs regs = { .eax = I8K_SMM_SET_FAN, }; - regs.eax = I8K_SMM_SET_FAN; - regs.ebx = (fan & 0xff) | (speed << 8); - if ((rc=i8k_smm(®s)) < 0) { - return rc; - } + speed = (speed < 0) ? 0 : ((speed > I8K_FAN_MAX) ? I8K_FAN_MAX : speed); + regs.ebx = (fan & 0xff) | (speed << 8); - return (i8k_get_fan_status(fan)); + return i8k_smm(®s) ? : i8k_get_fan_status(fan); } /* * Read the cpu temperature. */ -static int i8k_get_cpu_temp(void) +static int i8k_get_temp(int sensor) { - SMMRegisters regs = { 0, 0, 0, 0, 0, 0 }; - int rc; - int temp; + struct smm_regs regs = { .eax = I8K_SMM_GET_TEMP, }; + int rc; + int temp; #ifdef I8K_TEMPERATURE_BUG - static int prev = 0; + static int prev; #endif + regs.ebx = sensor & 0xff; + if ((rc = i8k_smm(®s)) < 0) + return rc; - regs.eax = I8K_SMM_GET_TEMP; - if ((rc=i8k_smm(®s)) < 0) { - return rc; - } - temp = regs.eax & 0xff; + temp = regs.eax & 0xff; #ifdef I8K_TEMPERATURE_BUG - /* - * Sometimes the temperature sensor returns 0x99, which is out of range. - * In this case we return (once) the previous cached value. For example: - # 1003655137 00000058 00005a4b - # 1003655138 00000099 00003a80 <--- 0x99 = 153 degrees - # 1003655139 00000054 00005c52 - */ - if (temp > I8K_MAX_TEMP) { - temp = prev; - prev = I8K_MAX_TEMP; - } else { - prev = temp; - } + /* + * Sometimes the temperature sensor returns 0x99, which is out of range. + * In this case we return (once) the previous cached value. For example: + # 1003655137 00000058 00005a4b + # 1003655138 00000099 00003a80 <--- 0x99 = 153 degrees + # 1003655139 00000054 00005c52 + */ + if (temp > I8K_MAX_TEMP) { + temp = prev; + prev = I8K_MAX_TEMP; + } else { + prev = temp; + } #endif - return temp; + return temp; } -static int i8k_get_dell_signature(void) +static int i8k_get_dell_signature(int req_fn) { - SMMRegisters regs = { 0, 0, 0, 0, 0, 0 }; - int rc; + struct smm_regs regs = { .eax = req_fn, }; + int rc; - regs.eax = I8K_SMM_GET_DELL_SIG; - if ((rc=i8k_smm(®s)) < 0) { - return rc; - } + if ((rc = i8k_smm(®s)) < 0) + return rc; - if ((regs.eax == 1145651527) && (regs.edx == 1145392204)) { - return 0; - } else { - return -1; - } + return regs.eax == 1145651527 && regs.edx == 1145392204 ? 0 : -1; } static int i8k_ioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg) { - int val; - int speed; - unsigned char buff[16]; - int __user *argp = (int __user *)arg; - - if (!argp) - return -EINVAL; - - switch (cmd) { - case I8K_BIOS_VERSION: - val = i8k_get_bios_version(); - break; - - case I8K_MACHINE_ID: - memset(buff, 0, 16); - val = i8k_get_serial_number(buff); - break; - - case I8K_FN_STATUS: - val = i8k_get_fn_status(); - break; - - case I8K_POWER_STATUS: - val = i8k_get_power_status(); - break; - - case I8K_GET_TEMP: - val = i8k_get_cpu_temp(); - break; - - case I8K_GET_SPEED: - if (copy_from_user(&val, argp, sizeof(int))) { - return -EFAULT; - } - val = i8k_get_fan_speed(val); - break; - - case I8K_GET_FAN: - if (copy_from_user(&val, argp, sizeof(int))) { - return -EFAULT; - } - val = i8k_get_fan_status(val); - break; + int val = 0; + int speed; + unsigned char buff[16]; + int __user *argp = (int __user *)arg; - case I8K_SET_FAN: - if (restricted && !capable(CAP_SYS_ADMIN)) { - return -EPERM; - } - if (copy_from_user(&val, argp, sizeof(int))) { - return -EFAULT; - } - if (copy_from_user(&speed, argp+1, sizeof(int))) { - return -EFAULT; - } - val = i8k_set_fan(val, speed); - break; + if (!argp) + return -EINVAL; - default: - return -EINVAL; - } + switch (cmd) { + case I8K_BIOS_VERSION: + val = i8k_get_bios_version(); + break; - if (val < 0) { - return val; - } + case I8K_MACHINE_ID: + memset(buff, 0, 16); + strlcpy(buff, i8k_get_dmi_data(DMI_PRODUCT_SERIAL), sizeof(buff)); + break; - switch (cmd) { - case I8K_BIOS_VERSION: - if (copy_to_user(argp, &val, 4)) { - return -EFAULT; - } - break; - case I8K_MACHINE_ID: - if (copy_to_user(argp, buff, 16)) { - return -EFAULT; - } - break; - default: - if (copy_to_user(argp, &val, sizeof(int))) { - return -EFAULT; - } - break; - } + case I8K_FN_STATUS: + val = i8k_get_fn_status(); + break; - return 0; -} + case I8K_POWER_STATUS: + val = i8k_get_power_status(); + break; -/* - * Print the information for /proc/i8k. - */ -static int i8k_get_info(char *buffer, char **start, off_t fpos, int length) -{ - int n, fn_key, cpu_temp, ac_power; - int left_fan, right_fan, left_speed, right_speed; - - cpu_temp = i8k_get_cpu_temp(); /* 11100 s */ - left_fan = i8k_get_fan_status(I8K_FAN_LEFT); /* 580 s */ - right_fan = i8k_get_fan_status(I8K_FAN_RIGHT); /* 580 s */ - left_speed = i8k_get_fan_speed(I8K_FAN_LEFT); /* 580 s */ - right_speed = i8k_get_fan_speed(I8K_FAN_RIGHT); /* 580 s */ - fn_key = i8k_get_fn_status(); /* 750 s */ - if (power_status) { - ac_power = i8k_get_power_status(); /* 14700 s */ - } else { - ac_power = -1; - } - - /* - * Info: - * - * 1) Format version (this will change if format changes) - * 2) BIOS version - * 3) BIOS machine ID - * 4) Cpu temperature - * 5) Left fan status - * 6) Right fan status - * 7) Left fan speed - * 8) Right fan speed - * 9) AC power - * 10) Fn Key status - */ - n = sprintf(buffer, "%s %s %s %d %d %d %d %d %d %d\n", - I8K_PROC_FMT, - bios_version, - serial_number, - cpu_temp, - left_fan, - right_fan, - left_speed, - right_speed, - ac_power, - fn_key); - - return n; -} + case I8K_GET_TEMP: + val = i8k_get_temp(0); + break; -static ssize_t i8k_read(struct file *f, char __user *buffer, size_t len, loff_t *fpos) -{ - int n; - char info[128]; + case I8K_GET_SPEED: + if (copy_from_user(&val, argp, sizeof(int))) + return -EFAULT; - n = i8k_get_info(info, NULL, 0, 128); - if (n <= 0) { - return n; - } + val = i8k_get_fan_speed(val); + break; - if (*fpos >= n) { - return 0; - } + case I8K_GET_FAN: + if (copy_from_user(&val, argp, sizeof(int))) + return -EFAULT; - if ((*fpos + len) >= n) { - len = n - *fpos; - } + val = i8k_get_fan_status(val); + break; - if (copy_to_user(buffer, info, len) != 0) { - return -EFAULT; - } + case I8K_SET_FAN: + if (restricted && !capable(CAP_SYS_ADMIN)) + return -EPERM; - *fpos += len; - return len; -} + if (copy_from_user(&val, argp, sizeof(int))) + return -EFAULT; -static char* __init string_trim(char *s, int size) -{ - int len; - char *p; + if (copy_from_user(&speed, argp + 1, sizeof(int))) + return -EFAULT; - if ((len = strlen(s)) > size) { - len = size; - } + val = i8k_set_fan(val, speed); + break; - for (p=s+len-1; len && (*p==' '); len--,p--) { - *p = '\0'; - } + default: + return -EINVAL; + } - return s; -} + if (val < 0) + return val; -/* DMI code, stolen from arch/i386/kernel/dmi_scan.c */ + switch (cmd) { + case I8K_BIOS_VERSION: + if (copy_to_user(argp, &val, 4)) + return -EFAULT; -/* - * |<-- dmi->length -->| - * | | - * |dmi header s=N | string1,\0, ..., stringN,\0, ..., \0 - * | | - * +-----------------------+ - */ -static char* __init dmi_string(DMIHeader *dmi, u8 s) -{ - u8 *p; + break; + case I8K_MACHINE_ID: + if (copy_to_user(argp, buff, 16)) + return -EFAULT; - if (!s) { - return ""; - } - s--; + break; + default: + if (copy_to_user(argp, &val, sizeof(int))) + return -EFAULT; - p = (u8 *)dmi + dmi->length; - while (s > 0) { - p += strlen(p); - p++; - s--; - } + break; + } - return p; + return 0; } -static void __init dmi_decode(DMIHeader *dmi) +/* + * Print the information for /proc/i8k. + */ +static int i8k_proc_show(struct seq_file *seq, void *offset) { - u8 *data = (u8 *) dmi; - char *p; - -#ifdef I8K_DEBUG - int i; - printk("%08x ", (int)data); - for (i=0; i<data[1] && i<64; i++) { - printk("%02x ", data[i]); - } - printk("\n"); -#endif - - switch (dmi->type) { - case 0: /* BIOS Information */ - p = dmi_string(dmi,data[5]); - if (*p) { - strlcpy(bios_version, p, sizeof(bios_version)); - string_trim(bios_version, sizeof(bios_version)); - } - break; - case 1: /* System Information */ - p = dmi_string(dmi,data[4]); - if (*p) { - strlcpy(system_vendor, p, sizeof(system_vendor)); - string_trim(system_vendor, sizeof(system_vendor)); - } - p = dmi_string(dmi,data[5]); - if (*p) { - strlcpy(product_name, p, sizeof(product_name)); - string_trim(product_name, sizeof(product_name)); - } - p = dmi_string(dmi,data[7]); - if (*p) { - strlcpy(serial_number, p, sizeof(serial_number)); - string_trim(serial_number, sizeof(serial_number)); - } - break; - } -} + int fn_key, cpu_temp, ac_power; + int left_fan, right_fan, left_speed, right_speed; + + cpu_temp = i8k_get_temp(0); /* 11100 s */ + left_fan = i8k_get_fan_status(I8K_FAN_LEFT); /* 580 s */ + right_fan = i8k_get_fan_status(I8K_FAN_RIGHT); /* 580 s */ + left_speed = i8k_get_fan_speed(I8K_FAN_LEFT); /* 580 s */ + right_speed = i8k_get_fan_speed(I8K_FAN_RIGHT); /* 580 s */ + fn_key = i8k_get_fn_status(); /* 750 s */ + if (power_status) + ac_power = i8k_get_power_status(); /* 14700 s */ + else + ac_power = -1; -static int __init dmi_table(u32 base, int len, int num, void (*fn)(DMIHeader*)) -{ - u8 *buf; - u8 *data; - DMIHeader *dmi; - int i = 1; - - buf = ioremap(base, len); - if (buf == NULL) { - return -1; - } - data = buf; - - /* - * Stop when we see al the items the table claimed to have - * or we run off the end of the table (also happens) - */ - while ((i<num) && ((data-buf) < len)) { - dmi = (DMIHeader *)data; - /* - * Avoid misparsing crud if the length of the last - * record is crap - */ - if ((data-buf+dmi->length) >= len) { - break; - } - fn(dmi); - data += dmi->length; /* - * Don't go off the end of the data if there is - * stuff looking like string fill past the end + * Info: + * + * 1) Format version (this will change if format changes) + * 2) BIOS version + * 3) BIOS machine ID + * 4) Cpu temperature + * 5) Left fan status + * 6) Right fan status + * 7) Left fan speed + * 8) Right fan speed + * 9) AC power + * 10) Fn Key status */ - while (((data-buf) < len) && (*data || data[1])) { - data++; - } - data += 2; - i++; - } - iounmap(buf); - - return 0; + return seq_printf(seq, "%s %s %s %d %d %d %d %d %d %d\n", + I8K_PROC_FMT, + bios_version, + dmi_get_system_info(DMI_PRODUCT_SERIAL) ? : "N/A", + cpu_temp, + left_fan, right_fan, left_speed, right_speed, + ac_power, fn_key); } -static int __init dmi_iterate(void (*decode)(DMIHeader *)) +static int i8k_open_fs(struct inode *inode, struct file *file) { - unsigned char buf[20]; - void __iomem *p = ioremap(0xe0000, 0x20000), *q; - - if (!p) - return -1; - - for (q = p; q < p + 0x20000; q += 16) { - memcpy_fromio(buf, q, 20); - if (memcmp(buf, "_DMI_", 5)==0) { - u16 num = buf[13]<<8 | buf[12]; - u16 len = buf [7]<<8 | buf [6]; - u32 base = buf[11]<<24 | buf[10]<<16 | buf[9]<<8 | buf[8]; -#ifdef I8K_DEBUG - printk(KERN_INFO "DMI %d.%d present.\n", - buf[14]>>4, buf[14]&0x0F); - printk(KERN_INFO "%d structures occupying %d bytes.\n", - buf[13]<<8 | buf[12], - buf [7]<<8 | buf[6]); - printk(KERN_INFO "DMI table at 0x%08X.\n", - buf[11]<<24 | buf[10]<<16 | buf[9]<<8 | buf[8]); -#endif - if (dmi_table(base, len, num, decode)==0) { - iounmap(p); - return 0; - } - } - } - iounmap(p); - return -1; + return single_open(file, i8k_proc_show, NULL); } -/* end of DMI code */ - -/* - * Get DMI information. - */ -static int __init i8k_dmi_probe(void) -{ - char **p; - - if (dmi_iterate(dmi_decode) != 0) { - printk(KERN_INFO "i8k: unable to get DMI information\n"); - return -ENODEV; - } - - if (strncmp(system_vendor,DELL_SIGNATURE,strlen(DELL_SIGNATURE)) != 0) { - printk(KERN_INFO "i8k: not running on a Dell system\n"); - return -ENODEV; - } - - for (p=supported_models; ; p++) { - if (!*p) { - printk(KERN_INFO "i8k: unsupported model: %s\n", product_name); - return -ENODEV; - } - if (strncmp(product_name,*p,strlen(*p)) == 0) { - break; - } - } - return 0; -} +static struct dmi_system_id __initdata i8k_dmi_table[] = { + { + .ident = "Dell Inspiron", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron"), + }, + }, + { + .ident = "Dell Latitude", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"), + }, + }, + { + .ident = "Dell Inspiron 2", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron"), + }, + }, + { + .ident = "Dell Latitude 2", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"), + }, + }, + { } +}; /* * Probe for the presence of a supported laptop. */ static int __init i8k_probe(void) { - char buff[4]; - int version; - int smm_found = 0; - - /* - * Get DMI information - */ - if (i8k_dmi_probe() != 0) { - printk(KERN_INFO "i8k: vendor=%s, model=%s, version=%s\n", - system_vendor, product_name, bios_version); - } - - /* - * Get SMM Dell signature - */ - if (i8k_get_dell_signature() != 0) { - printk(KERN_INFO "i8k: unable to get SMM Dell signature\n"); - } else { - smm_found = 1; - } - - /* - * Get SMM BIOS version. - */ - version = i8k_get_bios_version(); - if (version <= 0) { - printk(KERN_INFO "i8k: unable to get SMM BIOS version\n"); - } else { - smm_found = 1; - buff[0] = (version >> 16) & 0xff; - buff[1] = (version >> 8) & 0xff; - buff[2] = (version) & 0xff; - buff[3] = '\0'; + char buff[4]; + int version; + /* - * If DMI BIOS version is unknown use SMM BIOS version. + * Get DMI information */ - if (bios_version[0] == '?') { - strcpy(bios_version, buff); + if (!dmi_check_system(i8k_dmi_table)) { + if (!ignore_dmi && !force) + return -ENODEV; + + printk(KERN_INFO "i8k: not running on a supported Dell system.\n"); + printk(KERN_INFO "i8k: vendor=%s, model=%s, version=%s\n", + i8k_get_dmi_data(DMI_SYS_VENDOR), + i8k_get_dmi_data(DMI_PRODUCT_NAME), + i8k_get_dmi_data(DMI_BIOS_VERSION)); } + + strlcpy(bios_version, i8k_get_dmi_data(DMI_BIOS_VERSION), sizeof(bios_version)); + /* - * Check if the two versions match. + * Get SMM Dell signature */ - if (strncmp(buff,bios_version,sizeof(bios_version)) != 0) { - printk(KERN_INFO "i8k: BIOS version mismatch: %s != %s\n", - buff, bios_version); + if (i8k_get_dell_signature(I8K_SMM_GET_DELL_SIG1) && + i8k_get_dell_signature(I8K_SMM_GET_DELL_SIG2)) { + printk(KERN_ERR "i8k: unable to get SMM Dell signature\n"); + if (!force) + return -ENODEV; } - } - if (!smm_found && !force) { - return -ENODEV; - } + /* + * Get SMM BIOS version. + */ + version = i8k_get_bios_version(); + if (version <= 0) { + printk(KERN_WARNING "i8k: unable to get SMM BIOS version\n"); + } else { + buff[0] = (version >> 16) & 0xff; + buff[1] = (version >> 8) & 0xff; + buff[2] = (version) & 0xff; + buff[3] = '\0'; + /* + * If DMI BIOS version is unknown use SMM BIOS version. + */ + if (!dmi_get_system_info(DMI_BIOS_VERSION)) + strlcpy(bios_version, buff, sizeof(bios_version)); + + /* + * Check if the two versions match. + */ + if (strncmp(buff, bios_version, sizeof(bios_version)) != 0) + printk(KERN_WARNING "i8k: BIOS version mismatch: %s != %s\n", + buff, bios_version); + } - return 0; + return 0; } -#ifdef MODULE -static -#endif -int __init i8k_init(void) +static int __init i8k_init(void) { - struct proc_dir_entry *proc_i8k; - - /* Are we running on an supported laptop? */ - if (i8k_probe() != 0) { - return -ENODEV; - } - - /* Register the proc entry */ - proc_i8k = create_proc_info_entry("i8k", 0, NULL, i8k_get_info); - if (!proc_i8k) { - return -ENOENT; - } - proc_i8k->proc_fops = &i8k_fops; - proc_i8k->owner = THIS_MODULE; - - printk(KERN_INFO - "Dell laptop SMM driver v%s Massimo Dal Zotto (dz@debian.org)\n", - I8K_VERSION); - - return 0; -} + struct proc_dir_entry *proc_i8k; -#ifdef MODULE -int init_module(void) -{ - return i8k_init(); + /* Are we running on an supported laptop? */ + if (i8k_probe()) + return -ENODEV; + + /* Register the proc entry */ + proc_i8k = create_proc_entry("i8k", 0, NULL); + if (!proc_i8k) + return -ENOENT; + + proc_i8k->proc_fops = &i8k_fops; + proc_i8k->owner = THIS_MODULE; + + printk(KERN_INFO + "Dell laptop SMM driver v%s Massimo Dal Zotto (dz@debian.org)\n", + I8K_VERSION); + + return 0; } -void cleanup_module(void) +static void __exit i8k_exit(void) { - /* Remove the proc entry */ - remove_proc_entry("i8k", NULL); - - printk(KERN_INFO "i8k: module unloaded\n"); + remove_proc_entry("i8k", NULL); } -#endif -/* end of file */ +module_init(i8k_init); +module_exit(i8k_exit); |